Tinning-machine



R. L. COVINGTON.

TINNING MACHINE.

APPLICATION FILED JULY 15, 1919.

1,341,495. Patented May 25,1920.

4 SHEETS-SHEET I.

R. L. COVINGTON.

TINNING MACHINE.

LLLLLLLLLLLLLLLLLLLLLLLLLLL 9.

1,341,495. Patented May 25, 1920.

R. L. COVINGTON.

TINNING MACHINE.

APPLICATION FILED JULY 15. 1919.

i IT'E STA T OFFICE TINNING-MACI-IINE.

Specification of Letters Patent.

Patented May 25, 1920..

Application filed July 15, 1919. Serial No. 311,059.

To all whom it'may concern:

Be it known that I, RUBZTKT L. CovINGroK, a citizen of the UnitedStates, residing at lvlorgantown, in the county of Monongalia and Stateof lVest Virginia, have invented certain new and useful Improvements infilming-Machines; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to machines for applying tin plate to sheet metaland the primary object of the invention is to provide an improved meansfor accurately regulating the tension on the rollers for engaging thesheet metal, so as to coat the sheet metal with the desired amount oftin.

A. further object of the invention is to provide means for engaging therollers to normally hold the same in engagement with each other, saidmeans having adjustable weights, which can be placed at differentpositions so as to accurately determine the exact pressure on therollers for regulating the amount of tin metal coating on asheet ofmetal being treated.

A further object of the invention is to provide ll-toothed gearings oroblique toothed goarings in lieu of the ordinary spur toothed gearingsnow in vogue for connecting and driving the rollers, sot-hat unevenpressure and vibration on the plates as they pass through the rollerswill be eliminated.

A still further object of the invention is to provide an improved deviceof the above character, which is durable and efiicient in use, one thatis simple and easy to manufacture, and one that can be placed upon themarket at a reasonable cost.

lVith these and other objects in view, the invention consists in thenovel construction, arrangement and formation of parts, as will behereinafter more specifically described, claimed and illustrated in theaccompanying drawings forming a part thereof, in which:

Figure l is a transverse cross section through the tinning machine,

Fig. 2 is a fragmentary plan view of the machine, parts of the samebeing shown in section,

Fig. 3 is a similar view, showing the V- toothed gearing for connectingthe rolls,

Fig. 4 is a detail section through one of the weights shown in Fig. 1,

Fig. 5 is a fragmentary plan view of the machine showing the oppositeend thereof from that which is illustrated in Figs. 1 and 3,

Fig. 6 is a diagrammatic view showing the arrangement of the drivinggears carried by the rolls,

Fig. 7 is a diagrammatic view of the 0pposite ends of the rolls showingthe connecting gears, and

Fig. 8 is a View in elevation of the roller mounting.

Referring to the drawings in detail, wherein similar referencecharacters designate corresponding parts throughout the several views,the numeral 1 generally indicates the improved tinning machine whichincludes the tank 2, in which is adapted to be placed the tin coating 3.The tank 2 is of the ordinary or any preferred construction and receivesthe usual roller supporting frame l, which is held in position bysuitable brack ets 5.

The roller carrying frame a includes the side plates (3, which slid-ablyreceive the bearings T for the rollers 8, which are arranged insuperimposed pairs. The end plates 6 also carry the guides 9 for thesheet metal so as to guide the same through the rollers 8. As stated,the rollers 8 are mounted in superimposed pairs and are rotatablymountedin the bearings '77, which are slidably mounted in slots 10formed in the end plates. The bearings '7 are provided with upper andlower flanges 11 for engaging the outer sides of the plates 6 so as toprevent displacement of the bearings. The central portions of the wallsof the slots are provided with inwardly extending lugs 12, which dividethe pairs of rollers from each other. The rollers are pro vided withsuitable adjustable brushes or scrapers 13, as is usual in the ordinaryconstruction. The end plates carry downwardly extending slots 1%, whichare located at right angles to the slots 10 in which the bearings '7 areslidably mounted. Certain of the slots 1% communicate with the oppositeends of the upper and lower slots 10, while other of the slots 19:communicate with the inner ends of the upper and lower slots and all theslots it open out through the upper end of the plate, and these slotsreceive levers 15, 16, 17 and 18. The lever 15 is pivoted as at 19intermediate its ends on a pivot pin 20, which is carried by the upperterminals of the ears 21, carried by the upper surface of the end plateon each of the levers and the lever has its lower end provided with aright angularly positioned foot 22, which engages the outer bearing 7 ofone of the pairs of the upper rollers 8. The upper end of the lever isbent outwardly at right angles to provide the arms 24, which extend in adirection away from the rolls 8, and the same is provided with a seriesof graduations 25, with which is adapted to cooperate a sliding weight26 mounted on the arms. The lower end of the lever 16 is provided with afoot 27, which engages the inner roll of the other upper pair of therolls 8 and this lever is pivotally mounted as at 28 intermediate itsends to a pair of upstanding ears 29 formed on the upper surface of theplate. The upper end of the lever 15 is bent outwardly in the samedirection as the upper end of the lever 15 to provide a right angularlyextending arm 80,

which is formed relatively long and provided with suitable graduations31 with which is adapted to cooperate the sliding weight 32, the purposeof which will be hereinafter more fully described. The levers 17 and 18are identically constructed with the levers 15 and 16 and each of thesame is provided with the inwardly extending feet 33 for engaging one ofthe bearings of the rolls of the lowermost pairs and have their upperends provided with right angular arms 3%, which are suitably graduatedand receive the sliding weights 35.

Heretofore there has been no way to tell the exact pressure which isbeing applied to the rolls and as the pressure has much to do withregulating the amount of tin metal coating on a sheet of metal,considerable difiiculty has been experienced in coating sheet metal withthe correct amount of tin. By graduating the arms and moving the weight,the exact amount of pressure upon the rolls can be determined, and thusthe exact amount of tin coating on the sheet metal may be regulated.

The rolls are connected together at one end by oblique gears 36, whichtake away the vibration or uneven pressure from the plate, as it passesthrough the rolls, which cannot be obtained with the ordinary spur gearsnow in vogue.

In Fig. 3 is shown a modified form in which the V-toothed gearings areused and it has been found that this gearing also relieves unevenpressure on the plate and also vibration.

The opposite ends of certain of the rolls are provided with therelatively large drive gears 37 which are provided with either theoblique or V-teeth as may be desired.

In practice, I have found that the form of my invention illustrated inthe accompanying drawings and referred to in the above description, asthe preferred embodiment, is the most eflicient and practical; yetrealizing the conditions concurrent with the adoption of my device willnecessarily vary, I desire to emphasize that various minor changes indetails of construction, propor-;

tion and arrangement of parts may be resorted to, when required withoutsacrificing any of the advantages of my invention as set forth.

That I claim as new is:

1. In a tinning machine, a frame, bearings slidably mounted in theframe, rolls carried by said bearings, pivoted levers arranged to engagethe bearings, and weights adjustably carried by the levers whereby thepressure on said bearings can be regulated.

2. In a tinning machine, a roll carrying frame including end plates,bearings slidably carried by the end plates, rolls journaled in thebearings, levers pivoted intermediate their ends and arranged to engagethe bearings, said levers having right angularly extending arms formed011 the upper ends thereof extending in a direction away from saidrolls, and weights slidably mounted on the arms, whereby the pressure onsaid bearings can be regulated.

3. In a tinning machine, a roll carrying frame having slots formedtherein, bearings slidably mounted in the slots, rolls jourgraduated,and sliding weights mounted on said ends, as and for the purposespecified. In testimony whereof I aflix my signature m presence of twowitnesses.

ROBERT L. COVINGTON.

Vitnesses T. R. OovINcToN, TREVOR M. JONES.

pivotally car-

